Process of treating detinned iron and residues.



arren sras arnnr ornioia WILLIAM vV. lvlURRAY, OF BALTIMORE, MARYLAND, AND HARRY M. FERNBERGER, OF

PHILADELPHIA, PENNSYLVANIA.

PROCESS OF TREATING DETINNED IRON AND RESIDUES.

Specification of Letters Patent.

Patented Dec. 7?}, 1909 No Drawing. Original application filed January 17, 1906, Serial No. 296,569. Divided and this application filed February 1, 1909. Serial No. 475,424.

To all whom ii may concern:

Be it known that we, \Vinman \V. Mun- RAY, residing at Baltimore, in the State of hlaryland, and HARRY M. FERNBERGER, residing at Philadelphia, in the county of i hiladelphiaand State of Pennsylvania, have invented certain new and useful Improvements in Processes of Treating Detinned Iron and Residues, of which the following is a specification.

Our present invention consists in a process of treating detinned iron and residues which remain after the tin plate scrap, alloys and other tin-bearing materials have been subjected to the action of cilorin, and converted into chlorid of tin. T he residual mass, on account of its numerous interstices, contains a considerable percentage of the tin salt which is usually not recovered.

In our original application, filed Jan. 17, 1906, Serial N 296,569. we have disclosed a special process of det inning scrap and the like and in such process we make use of carbon tetrachlorid as a solvent for the dctinning agent chlorin gas and also for the resultant product stannic chlorid.

The present application is a divisional part of our original application filed January 17, 1906, before referred to.

After'thc detinning process has been per formed the solvent containing the stannic ohlorid is 'ithdrawn fromtho scrap. Owing to the fact that the residual u'iass on account of its numerous interstices retains a considerable percentage of the stannic chlorid, we have found it desirable, in practice to wash the dclinncd nrsiducs with i fresh solvent, such as an anhydrous organic v liquid of the methane series, for example carbon telrachlorid and the like, and thereby recover any stannic chlorid that may adhere to the detinncd residues. A'ttcr the detinncd l residue has been washed with fresh. solvent, as frequently as is necessary to accomplish the desired result, the stannic chlorid may be separated from the wash liquid by water and the solvent recovered, an aqueous solution of stannic chlorid resulting from the trcatnwnt of the wash liquid with water. After the wash liquid has been removed from the residues the portion adhering to such residue may be removed by further wz'ishing the residue with water and by the application of heat.

In this application we make no claim to any specific detinning process as the residues treated by our present process ma result from the use. of any (let-inning process.

\Vhatwe claim is:

1. The. process of treating dctinucd iron and residues, which consists in \vashii'ig the material with an anhydrous liquid capable of dissolving stannic chlorid.

2. The process otrcmoving slannic chlorid from the surfaces of dot inned iron and residues, which consists in washing the material with carbon 'tctrachlorid.

The process of treating dctinncd iron and residues. which consists in washing the material with an anlrvdrous liquid solvent of the methane series.

4:. The process of treating dctinncd iron and residues, which consists in washing the material with a liquid capable of dissolving slannic chlorid and then heating the same.

'l'liiRRY M. FlCliXBERiER.

Witnesses to W. \V. Murrays signal ure:

Romulus Kxion'r, ()c'mvirs O. Krzlorrr.

\Vitncssts to ll. M. Fernbcr g'cfs sip ua ture:

En 31A (1 ALnxANni-ui, ll an n Y Faun nnuonu. 

